The solution is 100% stable. 

Stability has been very good, even the older models of Unity are quite good. The non-XTs and the XTs have been absolutely stable. We have had a couple of small hardware glitches, e.g., I have had to replace an LCC. That is literally it over the last three years.

This is a stable solution.

It's an excellent product with high stability.

It is a stable product, and it is quite reliable. I haven't come across any bugs or glitches. It does not crash or freeze. I'd rate the stability nine out of ten. The downtime is literally zero.

I believe Unity is stable. However, we haven't used it for long, so I can't really know how stable it is until we have enough time to work with it.

We are highly pleased with the level of the stability so I am rating it ten out of ten. 

It has been really stable up to this point. There are no bugs or glitches. It does not crash or freeze. 

I've had some unexpected quirkiness, but for the most part, it's pretty good. Its stability is an eight out of ten.

The solution is very stable and I rate it a ten out of ten. 

The discussion revolves around the Ports program, which has been implemented and operates as a single system based on my direction. Additionally, adherence to government requirements is necessary.

It is a stable solution that sells a lot. Though we have sold Dell Unity XT to bigger companies, it is Dell PowerStore that we have sold the most to bigger companies that have around 1,000 to 5,000 users.

Dell Unity XT is a very stable and reliable solution. We can leave the solution alone for a month without needing to check on how the unit is operating, or if there are problems. We realized the benefit of using the solution in approximately one year of use.

Unity had a lot of trouble with stability in the beginning, but it is stable now.

I have never had any stability issues. It has been solid and stable. The dual platform, i.e., how it sits one head on top of the other, has been rock-solid. I have never had an issue with it.

I have noticed there is another version that has come out.

Stability is very good. It has been running for over a year now without problems. We haven't had any dropped layers.

We have not had any stability problems.

The previous version to 4.1.0 caused the array to stop responding during the code upgrade.

My impression of the stability is all positive.

So far, we've had no issues. We've been running the Unity for about half a year now; no issues with stability at all.

I rate Unity XT nine out of 10 for stability. Our customers are pleased with it. 

The Dell EMC Unity XT 450F is in production in our organization for the last three years, we have not faced any problems. The new version has been quite stable.

We are quite happy with the performance. The workload we are receiving on this storage solution is 70% for OLTP and 30% for reporting.

It is super stable. I haven't had any issues with it.

At this point, we've only had one major issue, and we've had two of the systems in-house for a year and a half. The issue was fixed within a matter of hours by support. In that same year and a half, we've had a lot of other pieces of equipment that have had a lot of other issues, so the stability is great, at least for us.

Dell Unity XT is a stable solution.

We have not had any issues with stability.

The stability is good.

It's stable. It works well.

I haven't had any issues with it at all. The stability has been very good.

The stability of Dell Unity XT is great. We have not received any complaints about errors or failures in deployments.

It is pretty stable. I like the stability, because everything works like it should. We made it all redundant. So, we don't have anything to worry about.

We are so virtual that we have two of us managing the whole infrastructure. Everything is taken care of and highly available. Nothing is vulnerable at all. Everything is good. There have been no issues at all, so far.

Stability has been 100%. We have had zero failures.

It's very solid. No issues at all. The only issue we have is that the power supply ramps up and down and makes some noise on SPA. But other than that being a nuisance, we haven't had any reliability issues at all.

I rate the stability a nine out of ten.

Dell Unity XT is very stable.

I would rate the stability of Dell Unity XT a five out of five.

We haven't used the solution for very long, so it may be hard to gauge the stability. However, so far, we haven't had any issues whatsoever. It doesn't crash or freeze. It doesn't have bugs or glitches. It seems quite stable.

The stability has been fine so far. We're good during normal operations.

The product has been pretty good.

There was one minor issue where we would get these alerts every six hours, but they were fake alerts. We installed a patch a week ago and it fixed the issue. Other than that, no issues, the product has been stable.

In terms of stability, so far everything has been fine.

No issues so far. It is very stable.

We have never had any problem beyond that which you would assume you might get out of a storage system.

I think it is really stable. We have had one Unity for two years and the second one was bought this year. I have roughly two years' experience and we have had no problems at all. Then again, we are only using Fibre Channels, so I don't know if the file side or the iSCSI side has issues. But the FC side is working very, very well.

Very few (some NAS related issues with early “UnityOS” versions, prior to 4.1).

I rate the product’s stability nine out of ten.

Dell EMC Unity XT is a stable product.

There was no problem with the stability. It was, as expected, very strong.

It has met our overall performance expectations. The solution runs as we need it to, without any issues. It hasn't failed.

It runs. No stability issues.

Dell Unity XT is a stable solution.

Unity is very stable. 

We cannot compare the stability with VMAX or PowerMax, but so far, so good.

We've had no issues with the Unity. We haven't had a failed drive yet.

The stability is fine.

The box has been on 24/7/365 with the exception of one day when we had to change out the batteries in our battery backup. We realized our network cord was not working in it. 

When I left to come the conference, I looked, and uptime on the battery said "527 days".

The stability is good. I don't see any issues with the Unity boxes.

Stability is perfect and consistent. We have had no downtime. It is reliable.

Stability is rock solid.

This product is stable on production.

I don't hear from any of my tech team. We put it in, and it has been stable. We have been through three patch cycles. Junior resources are taking care of it with no issues. Once we show them how it works, very little training is needed to get them up to speed.

It's very stable. No issues with it.

It's awesome. It hasn't missed a beat. We haven't had any issues with it whatsoever. Speed has been great. It does everything we need.

There has been no downtime. It has built-in redundancy upon redundancy, so I feel very confident with it.

The solution is stable.

The stability of Dell Unity XT is good.

The stability has completely satisfied us.

We had some problems in the beginning, but since they did the code upgrade and the bug fix, it has been solid for the last eight months. We haven't had any issues.

We've had almost no stability issues.

We had an issue once and it turned out to be a bug. There was a memory leak and we had an issue in our DR site where one controller would reboot and then come back up and then, later on, the other controller would reboot and come back up. Then it happened once on our production site where both controllers went down at the same time. We worked with Dell Support and they found a memory leak and they recommended we upgrade to the latest code version.

They have a script you run, a utility to gather the logs, etc., and then they analyze. The hardest problem was that, because they're analyzing logs, they have a certain SLA in which to do that. Even though we had a production issue and we wanted it resolved right away, it took them a few days to analyze the logs and get back to us.

The stability has been solid through dozens of implementations with our customers, from small to medium businesses running anywhere from 8TB to 10TB, up to some of our big enterprise customers using Unity for specialized systems running all-flash and half a petabyte type of scale. The performance and the stability of the platform have been stellar. No issues from customers.

Also, simple upgrades, stability right through the upgrade processes, they are very non-disruptive. It has been fantastic for all of our customers.

Stability could be better. I've had a few storage processor reboots; not as often as with VNX. And Clariion was a disaster. So, it has improved.

I haven't had any issues with stability.

We did an upgrade not that long ago and that was a little rough. They uploaded the firmware and it seems it was corrupted. When they went to go live with the upgrade process they had to re-download it, which took a while. I didn't have any issues personally but I saw some of the trials that the support and then the engineering teams went through. It made me a little anxious, watching that process.

The solution is stable.

We've had no issues with it. 

The performance is great. We have four or five different Unity arrays, and they have all run flawlessly.

We have had some downtime. Nothing is perfect. Unity’s have had some code-release problems, versions that, from a compatibility perspective, had some glitches which caused an outage. But, given the amount of Unity’s we run, that has been fairly minor and it hasn't happened at scale or across all of our Unity’s. 

It's more like, "Hey, we have a new code. Let's deploy it," and we have a situation where we can deploy it in a given location first. So we deploy in that location. Oops, it has an issue. Roll back and get Dell EMC engaged and resolve it and move on.

It hasn't really been that big of a deal. As a great "for instance," with ExtremeIO - which we bought starting about two years ago, and deployed in one of our divisions as their primary storage because we needed performance there - it's had so many issues that upper management has essentially banned us from ever buying an ExtremeIO again, because of the downtime. Either because of compatibility or just straight up code problems, it's just not a stable SAN. And the one thing you want out of a SAN is that it has to be stable.

So as long as Unity remains good and stable, that will be a primary reason that we use it.

It's very stable. The current firmware version we're on is the latest and greatest, so we've been pretty happy with the overall performance and availability of the platform.

Unity XT is stable.

I have found Dell EMC Unity XT to be stable.

Like any other storage array, SAN, or NAS, it is very reliable. We haven't had any issues with it.

I don't have any complaints from the customers or end users, who are using this solution. It's up and running with no worries.

Stability is the problem. We've had stability issues with it. We've had problems with the iSCSI interface. We've had it for two years now and for two years we've had problems where a service processor will drop, we'll lose connectivity to LUNs, we'll lose connectivity to the storage, issues like that. No matter how we've tried to chase it down, everybody just points fingers at each other. The only thing that changed in our environment was that the Unity solution was installed. It's the "least common factor."

The maturity level of the Unity is getting better and better as we speak. The latest and greatest cores are becoming more stable than the previous one. EMC is doing a lot of investment in research and development. They're getting better and better.

We hear from our customers that it is stable. The other thing that customers say is that it's easy to manage. But, as I previously said, I think it has some things that are not ready yet and they are being announced for the next releases, such as inline compression and deduplication, IP replication, synchronous replication. VNX used to have these but Unity, not yet so. But we have good feedback about the product.

Yes, we had an issue in January with a Service Processor rebooting unexpectedly. Dell EMC resolved this quickly with a special build of the OE and a permanent fix was included in the next public release.

No stablility issues.

It is very stable. We have never had an issue with it.

There were no stability issues.

I did not encounter any stability issues.

The solution is stable. 

Dell EMC Unity XT is stable.

The stability is good. We are very happy with the Unity.

It does what it says it does. It performs, so you never have performance problems with it.

The stability has been very good. We've had it for a couple years, really like it.

It's been very stable. We haven't had any issues. I think we had a drive go out and it was quick to alert us and they made sure that we got it replaced without any failures. Everything has been great.

To me, the stability is impeccable.

Stability is great. It has been very rock solid.

OE 5.03 was a rather mature and stable code, without to say that it will address all. Some bugs are stress/load triggered and rather exceptional but might be easily recurring if the same conditions are met again. 

===> Review 01/2023

Code 5.1 has no improvement, quite on the contrary, there was initially also an issue with Veeam in the sense that DELL EMC unilaterally deprecated some commands, which caused Veeam to no longer be able to interface with it for storage-based snapshots of ESXi VMs. There came a code/OE specifically to address this, but it took a while, likewise, the solution from Veeam to replace their integrated and deprecated UEM CLI interface took even longer to accommodate DELL Unity product engineering changes.

Code 5.1 flaw-

All Unity systems running Unity Operating Environment (OE) version 5.1.X, but primarily Unity XT systems (480, 680, or 880, including F models), may experience SP panics after 275-300 days of runtime.

I have had no problem at all. I think this is one of the most important things. It is very good. Maintaining it and deploying updates require very low maintenance. We haven't had problems. We had to replace a couple of disks in all these years, but it was pretty straightforward.

The solution is stable.

It is very stable.

It's very stable. We hardly get into the device itself to manage it on a daily basis. It's been great.

The stability is quite okay. We have not had any downtime with the Unity. We have only been using it for three months. We have just finished the migrations, but so far it is working quite well.

No issues with stability.

Dell EMC Unity XT is reliable.

No issues. A very stable product. In previous roles, I have also used the earlier models. The VNX Series and EMC do a really good job. 

The operating environment is very stable. I have no complaints and no bugs were noticed so far.

We actually haven't tested it yet.

Stability seems to be good but we had some issues recently because of a bug in the system. We were presenting LANs to the Unity array but I think it caused a disruption to the host. EMC did acknowledge it and provided an alternative way to do it. We felt that this could have been avoided. It caused downtime to the host on two occasions.

No complaints about the stability. Our customers are very happy with it.

It seems rock solid so far.

I haven't run across any bugs in it yet, even from the implementation I did previously. We have had it in place in our environment for approximately three months now. I did an upgrade - the project manager wasn't happy that I did it - but the upgrade was very simple. It has performed like it is supposed to.

No stability issues. Absolutely none.

It's a stable product. You look at something like Unity, which is based on several generations of product, it's built on products such as the Clariions and the VNX, etc., so it's pretty stable. It's a tried and true product.

From the beginning, we've had no issues. Since it's been turned on, it's worked flawlessly.

We haven't had any issues with it, any outages. We have a lot of users and it's been able to handle our high usage rate.

It's very stable. We have not had any issues with it since we put it in. We've had one drive fail in two years. It was easily replaced, a hot swap and done. It has been incredibly easy and been stable for two years.

It was difficult at first. It wasn't very stable. It was crashing a lot. I think we were early adopters and, during the file side of migration, it crashed a number of times.

We've had no issues. The customers talk to us before they do an upgrade and we say, "Yeah, it should be no problem." They go ahead and do it themselves now, and there have been no outages or unplanned downtime.

We went from the VNX, where we had about 900 spinning disks, to 27 solid-state disks. There have been no failures in the last year.

I did not encounter any stability issues.

Dell EMC Unity XT is very reliable.  I used to use legacy EMC products, such as VNX. This product has a long story.

It is pretty reliable.

So far so good. No issues with stability.

No issues.

We have found this solution to be quite stable.

It is very stable.

Stability is excellent. We have never had downtime with Unity.

No issues with stability so far, but it's early days. We have only been using it a few weeks.

Stability has been pretty rock solid for us. We actually did have one outage that was due to a bug in the code which caused the kernel to just run off on itself. It was a known bug. We probably should have been up on the newer code. We were a level behind. Although that bug was known, it caught us off guard.

Since then, we have had no issues with the stability. We have had 100 percent uptime.

This is a stable product and we don't have a lot of incidents with it.

It has good stability

It requires only one technician for deployment and maintenance.

It runs. It operates. Developers can do their development work. It's not screaming-fast, but it doesn't fall down when you bring up a workload. So it's performing as expected.

We did encounter a firmware bug which actually caused loss of data. There was some heartburn around that. But in general, it has operated as expected, except for that bug. Fortunately, we found the bug in pre-production, so we didn't lose anything that we needed. However, had it been in production, we'd be having a very different conversation about Unity.

The feedback I have is it's quite stable. We have a configuration with VPLEX. The issues are not coming from the Unity itself, in general. It's more about the SAN or the VPLEX, the virtualization layer. On that specific point, I'd say the Unity is doing well. It's reliable.

We have had a lot of issues. We've got massive issues at the moment with IBM AIX. It's not stable. We have a lot of disk errors, production crashes sometimes, and that's not good for a retailer.

Also, we still have to administer the Celerra because we have massive issues with the filer system of Unity. We hope it gets better with the 4.2 or 4.3 release. We do not have the integration for connection to Centara. This means we have to keep the data on Celerra and cannot migrate to Unity.

Obviously, we haven't had it in the field for years, but we haven't had any problems with it and we've deployed close to 150 of them.

It is stable. I have not personally seen any issues when deploying in a customer environment.

The product is reliable.

Not at all. No issues with stability.

We didn’t encounter any stability issues.

Small and medium-sized companies can benefit from this product.

We haven't seen an issue with it since the day we installed. It has been only two months but it's good.

We've had no issues with it whatsoever, as far as stability goes.

I would say it is stable now. Of course, the first releases had some issues but I believe it is fine now.

It is very stable. While I have had downtime, it has mostly been due to a bug in the MCX version.

We're happy with the stability. We have not had any issues with it. We run all-flash on two of them and, so far, we have not had any complaints about performance issues.

No, but I found some articles about a code upgrade that solved some issues.

This product has been stable. 

My impression is that the solution is stable and reliable.

It's very stable. We haven't had any major issues with downtime.

It's rock solid. All of the EMC arrays are rock solid. I wouldn't expect anything less.

Unity is a pretty stable product.

I did not encounter any stability issues.

The stability is awesome. It is very stable. No issues.

It is stable. I give it that. I have had no issues such as where it just decides to take a vacation or drop dead. I've never had that happen. It's pretty stable. 

None whatsoever. A big update was released in which Dell contacted us and did the upgrade.

No.

Excellent stability. A lot of ours are older, even past what would be considered end-of-life, but they still have a very low failure rate.

At the moment, there are no issues.

We once had an issue where one LAN was full, and because it was full it was making the SP reboot. But with the upgrade, we decide it was a non-issue, and with the upgrade, it was fixed. The upgrade fixed it.

It is pretty stable.

It is not stable enough.

It's not as reliable as it should be, I think it was probably released a little early. We've had production problems with customers, and there are still some challenges at scale as well.

Compression is a problem for the system. Once you enable dedupe and compression, the performance of the system, the capability, halves. Customers don't necessarily realize that, and they can't get as much out of the system as they initially thought. It has to be right-sized and sized for compression, but even with that, because there are only two storage processors, you're ending up at almost 40 percent usage.

Sure did.

It is very stable.

It was pretty buggy when we first got it, but they have improved it with some updates. They worked with us and addressed our concerns.

No issues.

There were issues with the earlier releases, not now.

Yes, sometimes the DNS does not work out properly.

Yes, but did not affect systems which relay on it. Firmware patch was released by EMC.

It's very stable.

This is a very stable platform, so far zero issues.

Very stable. Sometimes you can have issues, but they are usually solved with an upgrade of the system.

We have had two issues: replication between two Unity's, and when running several Snapshots on the Unity.

It's more stable than the old generation of arrays. We had a lot of issues with the VNX, for example, but they got better over time. The VNX2 was better, and the Unity has been even more stable.

So far it's proven very reliable and very flexible.

We have had no stability issues with the product, including when adding replication on the fly, customer installed code updates, and customer installed DAEs.

I did not encounter any stability issues.

It is stable.